linux-kernel - Re: [PATCH 4/8] drm/ssd13xx: Use drm_format_info_min_pitch() to calculate the dest

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Message-ID: <CAMuHMdWmzUx6iOhSSfNz4NyMZ0vY6Md6cn86S0BjOjhzzPuO=g@mail.gmail.com>
Date:   Wed, 11 Oct 2023 09:59:56 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Javier Martinez Canillas <javierm@...hat.com>
Cc:     linux-kernel@...r.kernel.org, Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...il.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH 4/8] drm/ssd13xx: Use drm_format_info_min_pitch() to
 calculate the dest_pitch

Hi Javier,

On Mon, Oct 9, 2023 at 8:36 PM Javier Martinez Canillas
<javierm@...hat.com> wrote:
> Don't assume bpp of 1 and instead compute the destination pitch using the
> intermediate buffer pixel format info when doing a format conversion.
>
> Signed-off-by: Javier Martinez Canillas <javierm@...hat.com>

Thanks for your patch!

> --- a/drivers/gpu/drm/solomon/ssd13xx.c
> +++ b/drivers/gpu/drm/solomon/ssd13xx.c
> @@ -148,6 +148,8 @@ struct ssd13xx_plane_state {
>         struct drm_shadow_plane_state base;
>         /* Intermediate buffer to convert pixels from XRGB8888 to HW format */
>         u8 *buffer;
> +       /* Pixel format info for the intermediate buffer */
> +       const struct drm_format_info *fi;

This is really intermediate, as it is removed again in the next patch :-)

In fact 60% of this patch is changed again in the next patch.
So perhaps combine this with the next patch?

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds